the mordant in the gram stain procedure is
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Nursing Elites

NCLEX-RN

NCLEX RN Predictor Exam

1. In the Gram Stain procedure, which component acts as the mordant?

Correct answer: C

Rationale: In the Gram Stain procedure, the mordant is Gram's Iodine. The purpose of the mordant is to form a complex with the crystal violet, enhancing its ability to bind to the cell wall. Crystal violet is actually the primary stain used in the Gram Stain procedure to initially color all cells. Methyl alcohol is the decolorizer that removes the crystal violet from certain cell types. Safranin is the counterstain used to stain those cells that did not retain the crystal violet stain after the decolorization step.

2. Patients have a right to ______________.

Correct answer: B

Rationale: Patients have a legal right to access all of their health-related information. This includes details about their health condition, treatment options, test results, and any other relevant data. Providing patients with all their health-related information empowers them to make informed decisions about their care, promotes transparency in the healthcare process, and respects their autonomy. Choices A, C, and D are incorrect because they restrict the information patients should receive based on assumptions or limitations, which goes against the principle of patient autonomy and their right to access their complete health-related information.

3. A resident brings several electronic devices to a nursing home. One of the devices has a two-pronged plug. What rationale should the nurse provide when explaining why an electrical device must have a three-pronged plug?

Correct answer: A

Rationale: A three-pronged plug functions as a ground to dissipate stray electrical currents. This helps prevent electrical shocks and ensures the safety of the user. Choice B is incorrect because the number of prongs on a plug does not impact the efficient use of electricity. Choice C is incorrect because a three-pronged plug does not shut off the appliance during an electrical surge; that role is typically fulfilled by surge protectors. Choice D is incorrect as a three-pronged plug does not divide electricity among appliances in a room; it primarily serves as a safety measure to handle excess electrical currents.

4. To accurately assess a patient's respiration rate, which of the following methods would be BEST?

Correct answer: B

Rationale: The most accurate method to assess a patient's respiration rate is to count the breaths simultaneously while counting the pulse rate. This approach ensures that the patient is unaware of the specific focus on their breathing, preventing any conscious alteration in breathing patterns. Choice A is incorrect because informing the patient may lead to altered breathing as the patient may consciously change their breathing pattern. Choice C involves counting the pulse rate first, which is not necessary for assessing respiration rate. Choice D is incorrect as it includes unnecessary steps such as taking the patient's temperature before counting respiration rate, which adds no value to accurately assessing the respiration rate.

5. Which of the following tests would MOST LIKELY be performed on a patient who is being monitored for coagulation therapy?

Correct answer: A

Rationale: The correct answer is A: PT/INR. Prothrombin times (PT/INR) are commonly used to monitor patients on Coumadin (warfarin) therapy, an anticoagulant that slows the blood's ability to clot. Monitoring PT/INR levels helps ensure the patient is receiving the appropriate dosage of Coumadin. Choice B, CBC (Complete Blood Count), is a general test that provides information on red blood cells, white blood cells, and platelets but is not specific to monitoring coagulation therapy. Choice C, PTT (Partial Thromboplastin Time), is another coagulation test but is not as commonly used for monitoring Coumadin therapy. Choice D, WBC (White Blood Cell count), is unrelated to monitoring coagulation therapy and is used to assess immune system function.

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